I'm not sure where I heard this one...

Bite Off Your Nose to Spite Your Face

There was this cat that if you tried to force him to do something he didn't want to do, such as go to the vet, he would get you back by tearing up one of his own toys to bits, then arrange the peices on his owner's pillow. But he would never destroy anything of the owner's, just his own things. Dumb?